package com.itheima.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.common.R;

import com.itheima.dto.DishDto;
import com.itheima.pojo.Category;
import com.itheima.pojo.Dish;
import com.itheima.pojo.DishFlavor;
import com.itheima.service.CategoryService;
import com.itheima.service.DishFlavorService;
import com.itheima.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;
import javax.websocket.server.PathParam;
import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@Slf4j
@RestController
@RequestMapping("/dish")
public class DishController {
    @Autowired
    private DishService dishService;
    @Autowired
    private CategoryService categoryService;
    @Autowired
    private DishFlavorService dishFlavorService;
    @Autowired
    private RedisTemplate redisTemplate;


    /**
     * 分类分页查询
     *
     * @param page
     * @param pageSize
     * @return
     */
    @GetMapping("/page")
    public R<Page> getPage(Integer page, Integer pageSize, String name) {
        log.info("当前页数：" + page + "数据" + pageSize);
        //构建分页构造器
        Page<Dish> pageIn = new Page<>(page, pageSize);
        Page<DishDto> dishDtoPage = new Page<>();
        //构建条件构造器
        LambdaQueryWrapper<Dish> wrapper = new LambdaQueryWrapper<>();
        wrapper.like(StringUtils.isNotEmpty(name), Dish::getName, name);
        wrapper.orderByAsc(Dish::getPrice);
        dishService.page(pageIn, wrapper);
        //对象拷贝
        //BeanUtils工具：实现两个对象数据的复制
        /**
         * 参数1：源对象
         * 参数2：目标对象
         * 参数3：忽略拷贝的字段
         */
        //重新构建dish列表对象，查询当前菜品的分类名称，封装到dishDto对象中
        BeanUtils.copyProperties(pageIn, dishDtoPage, "records");
        List<Dish> records = pageIn.getRecords();
        List<DishDto> list = records.stream().map((item) -> {
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item, dishDto);
            Long categoryId = item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);

            if (category != null) {
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            return dishDto;
        }).collect(Collectors.toList());
        dishDtoPage.setRecords(list);
        return R.success(dishDtoPage);
    }

    /**
     * 添加菜品
     *
     * @param dishDto
     * @return
     */
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto) {
        log.info("添加新员工");
//        dishService.save(dish);
        dishService.saveWithFlavor(dishDto);
        //清理某个分类下面的菜品缓存数据
        String key="dish_" + dishDto.getCategoryId()+"_1";
        redisTemplate.delete(key);
        return R.success("添加成功");
    }

    /**
     * 根据id查询菜品信息和对应的口味信息
     *
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id) {
        DishDto dishDto = dishService.getByIdWithFlavor(id);
        return R.success(dishDto);
    }

    /**
     * 修改菜品
     *
     * @param dishDto
     * @return
     */
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto) {
        log.info("修改当前id");
//        dishService.updateById(dishDto);
        dishService.updateWithFlavor(dishDto);
        //清理所有菜品下面的菜品缓存数据
//        Set keys = redisTemplate.keys("dish_*");
//        redisTemplate.delete(keys);
        String key="dish_"+dishDto.getCategoryId()+"_1";
        redisTemplate.delete(key);
        return R.success("修改成功");
    }

    /**
     * 删除、批量删除菜品
     *
     * @param ids
     * @return
     */
    @DeleteMapping
    public R<String> delete(@RequestParam List<Long> ids) {
        log.info("删除所选id");
//        dishService.removeById(id);
        dishService.deleteWithFlavor(ids);
        return R.success("删除成功");
    }

    /**
     * 菜品的起售、禁售
     *
     * @param status
     * @param ids
     * @return
     */
    @PostMapping("/status/{status}")
    public R<String> sell(@PathVariable("status") Integer status, @RequestParam List<Long> ids) {
        log.info("根据id进行起售和禁售");
        dishService.statusWithFlavor(status, ids);
        return R.success("状态修改成功");
    }

    /**
     * 根据条件查询对应的菜品数据
     *
     * @param dish
     * @return
     */
    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish) {
        List<DishDto> dishDtoList=null;
        //动态构造key
        String key="dish_"+dish.getCategoryId()+"_"+dish.getStatus();
        //先从Redis中获取缓存数据
        dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);
        if (dishDtoList!=null){
            //如果存在，直接返回，无需查询数据库
            return R.success(dishDtoList);
        }
//        return R.success(dishDtoList);
        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null, Dish::getCategoryId, dish.getCategoryId());
        //添加条件，查询状态为1（起售状态）的菜品
        queryWrapper.eq(Dish::getStatus, 1);
        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        List<Dish> list = dishService.list(queryWrapper);
        List<DishDto> dishDtoList1 = list.stream().map((item) -> {
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item, dishDto);
            Long categoryId = item.getCategoryId();
            Category category = categoryService.getById(categoryId);
            if (category != null) {
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> wrapper = new LambdaQueryWrapper<>();
            wrapper.eq(DishFlavor::getDishId, dishId);
            List<DishFlavor> dishFlavorList = dishFlavorService.list(wrapper);
            dishDto.setFlavors(dishFlavorList);
            return dishDto;
        }).collect(Collectors.toList());
        //如果不存在，需要查询数据库，将查询到的菜品数据缓存到Redis
        redisTemplate.opsForValue().set(key,dishDtoList,60, TimeUnit.MINUTES);
        return R.success(dishDtoList1);
    }
}